Quadrilateral is cyclic

MATHEMATICS · Single correct · CBSE · Mathematics · Circles · Circles

Problem

Quadrilateral

P Q R S

is cyclic. If

\angle P = 75^{\circ}

and

\angle Q = 75^{\circ}

, then

\angle R

equals (a)

120^{\circ}

(b)

75^{\circ}

(c)

105^{\circ}

(d)

90^{\circ}